CN112830456A

CN112830456A - Oxygen concentrator casing and use oxygen concentrator of this casing

Info

Publication number: CN112830456A
Application number: CN202110178960.7A
Authority: CN
Inventors: 毛坚强; 蔡林泉; 张丽琴; 陶然
Original assignee: Tibet Yuyue Medical Investment Co ltd; Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Current assignee: Tibet Yuyue Medical Investment Co ltd; Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-05-25
Also published as: WO2022166447A1

Abstract

The utility model provides an oxygen concentrator casing and use oxygen concentrator of this casing, includes the shell body and is used for holding adsorption tower subassembly, fan and air compressor's interior casing, and interior casing forms double-deck hollow shell structure with the shell body, wherein: the air inlet is positioned on one side of the outer shell, the waste gas outlet is positioned on the other side of the outer shell, and the cooling air inlet is positioned on one side of the inner shell, which is far away from the air inlet. The air inlet is communicated with the interlayer space between the cooling air inlets, and the cooling air outlet is communicated with the waste gas outlet. In the working state, cooling air is discharged from the waste gas outlet after passing through the air inlet, the interlayer space, the cooling air inlet, the space of the inner shell and the cooling air outlet in sequence. The shell of the oxygen concentrator is improved and designed from multiple angles, the internal space is reasonably planned, the shell design is optimized, the function, the performance and the manufacturability of the shell are further improved, and the industrial mass production is facilitated.

Description

Oxygen concentrator casing and use oxygen concentrator of this casing

Technical Field

The invention relates to an oxygen-nitrogen separation device, in particular to an oxygen concentrator shell and an oxygen concentrator using the same.

Background

The oxygen-nitrogen separation device is a device for separating nitrogen and oxygen in air. Such devices are classified into a nitrogen concentrator and an oxygen concentrator, wherein the oxygen concentrator is a device that can provide high-concentration oxygen for human breath. With the improvement of living standard and social progress of people, people have more understanding on the oxygen concentrator, the use demand is continuously increased, and the oxygen concentrator is widely applied to hospitals and families and gradually expanded to the industries of cultivation and the like. In the medical and health industry, the oxygen concentrator can be used for oxygen therapy for people suffering from respiratory system diseases, cardiovascular system diseases, cerebrovascular diseases, altitude stress and altitude diseases, and also for middle-aged and elderly people, students with excessive use of brain, pregnant women and other people working and living in an anoxic environment. Because the pure oxygen is absorbed more, the blood circulation can be promoted, the brain can be fresh, the fatigue can be eliminated, and the working efficiency can be effectively improved, therefore, the oxygen concentrator is provided in daily life or workplaces to facilitate the use at any time, and the life style is also good.

At present, the structural style of the existing oxygen concentrator in the market is various, the structure of the existing oxygen concentrator mainly comprises a shell, a compressor, an adsorption tower, a reversing device, a fan, a gas storage tank, a control circuit and the like, the compressor provides compressed air during working, the gas flow direction is distributed by the reversing device by applying the PSA (pressure swing adsorption) principle, and the finished gas is collected to the gas storage tank through the adsorption tower, so that continuous oxygen generation is realized. Among them, although the compressor and the adsorption tower are core components of the oxygen concentrator, they are commercially available as a manufacturer, and the shell is not directly available on the market and needs to be designed by itself. For manufacturers, the structural framework of the housing as the oxygen concentrator not only relates to the functional designs such as the spatial layout of each part in the housing and the air duct planning, but also directly influences the product performance, such as the sound insulation and noise reduction effect, the assembly convenience, the structural strength and the product manufacturing cost. Thus, the design of the oxygen concentrator is in part based on the design of the oxygen concentrator housing.

Chinese patent CN205755119U announces a patent No. 201620694283.9 entitled "shell and oxygen generator of oxygen generator". This patent is focused on the mode of the noose mechanism between preceding shell and the backshell to and preceding shell and backshell form one end open-ended system oxygen subassembly holding chamber after linking up each other, still including being used for covering simultaneously the open-ended third divides the casing just forms holistic oxygen concentrator shell body by three branch casing. In addition, a patent No. 201922307431.3 is issued by the chinese patent CN211141526U, which is named as a utility model of "a molecular sieve oxygenerator". The outer case of the patent consists of five shells and a base, the inner case is formed by combining three shells, and according to the description of the inner case and the characteristics of the oxygen concentrator on the market, other structural parts are required to fix other parts of the oxygen concentrator in the shell. In summary, the housing designs of these patents suffer from the following disadvantages: firstly, the sound insulation and noise reduction effects are poor, and the noise is high during working; secondly, the integration degree of parts is low, and the assembly process is complex; thirdly, the manufacturing cost of the product is relatively higher.

In view of this, how to optimally design a product from the perspective of shell design, while satisfying functional designs such as product internal space layout and air duct planning, product performance is improved and manufacturability of product manufacturing is improved, so as to better embody rationalization and refinement of product structure, and accord with the green product concept is the subject of the research of the present invention.

Disclosure of Invention

The invention provides an oxygen concentrator shell and an oxygen concentrator using the same, and aims to solve the functional problem (compared with an air duct design) and the performance problem (sound insulation and noise reduction) of an original oxygen concentrator due to unreasonable shell design and solve the technical problem (inner shell design and assembly convenience) of the original oxygen concentrator so as to optimize product design.

In order to achieve the purpose, the technical scheme adopted by the oxygen concentrator shell is as follows: an oxygen concentrator shell, its innovation lies in: including the shell body and be used for holding adsorption tower subassembly, fan and air compressor's interior casing, interior casing is located the space of shell body to be separated by a certain distance at lateral part or/and top with the shell body to this forms double-deck hollow shell structure, wherein:

the outer shell is provided with an air inlet and a waste gas outlet, and the inner shell is provided with a cooling air inlet and a cooling air outlet.

And taking the use state of the shell as reference, the air inlet is positioned on one side of the outer shell, the waste gas outlet is positioned on the other side of the outer shell, and the cooling air inlet is positioned on one side of the inner shell, which is far away from the air inlet. The air inlet and the cooling air inlet are communicated through an interlayer space between the outer shell and the inner shell, and the cooling air outlet is communicated with the waste gas outlet. The cooling air passes through the air inlet, the interlayer space, the cooling air inlet, the space of the inner shell and the cooling air outlet in sequence to the waste gas outlet to form a channel in an assembly state, and the cooling air is discharged from the waste gas outlet after passing through the air inlet, the interlayer space, the cooling air inlet, the space of the inner shell and the cooling air outlet in sequence in a working state.

The relevant content in the above technical solution is explained as follows:

1. in the above solution, the outer casing mainly comprises a front casing, a rear casing and a base, and the front casing is located on the front side, the rear casing is located on the back side and the base is located on the bottom, with reference to the oxygen concentrator casing in the use state (fig. 4 designates the use state reference diagram of the casing of the present invention). The front shell and the rear shell are both of concave shell structures, the front shell and the rear shell are oppositely spliced in the front and rear directions to form the side part and the top of the outer shell in an assembling state, the base is of a base structure, and the base is spliced with the front shell and the rear shell in the up and down directions to form the bottom of the outer shell.

2. In the above scheme, the inner housing mainly comprises an absorbing hood, a fan housing and an inner cover, with reference to the housing of the oxygen concentrator in a use state, the absorbing hood is located at one of the left side and the right side, the fan housing and the inner cover are located at the other side, wherein the fan housing is located at the upper part of the other side, and the inner cover is located at the lower part of the other side. The suction hood is of a hood body structure, the bottom and the wall surface of one side of the suction hood are opened to form an open end, the wind hood and the inner hood are both of the hood body structure, the bottom of the wind hood is opened to form an open end, the open ends of the bottom of the wind hood and the bottom of the inner hood are downward in an assembled state, the open end of the bottom of the wind hood is spliced on the top of the inner hood, the open end of one side of the suction hood is simultaneously spliced with the side portions of the wind hood and the inner hood, the combination of the wind hood and the inner hood and the suction hood are arranged on the left side and the right side in parallel, and the open ends of the bottom of the.

3. In the above scheme, the top of base is equipped with the backup pad, and this backup pad is platelike structure, is equipped with the cavity on the base, and the backup pad is located the base top and covers on the cavity top, exhaust outlet establishes the lateral part at the base, the cavity and the exhaust outlet intercommunication of base.

4. In the above scheme, be equipped with the first baffle of base in the cavity of base, the first baffle of base is the plate body and arranges about in the cavity, is equipped with the bars hole on the first baffle of base, and the first baffle of base divides the space of cavity into two, and wherein a part space communicates with the space of interior casing, and a part space communicates through the bars hole with another part space, and another part space communicates with the exhaust outlet.

5. In the above scheme, the horizontal section of the first partition plate of the base is a door frame-shaped partition plate, the door frame-shaped partition plate divides the space of the concave cavity into a part of central space and another part of peripheral space, and the part of central space and the other part of peripheral space form a horizontal circulation air duct in the concave cavity of the base.

6. In the above scheme, air inlet establishes the lateral part at preceding shell or/and backshell, is equipped with two first spacing muscle of suction hood to air inlet between suction hood and preceding shell or/and backshell, and two first spacing muscle of suction hood are located the intermediate layer space between shell body and the interior casing and parallel arrangement in upper and lower direction, form the first section wind channel that upwards reaches intermediate layer space top from air inlet.

7. In the above scheme, a second section of air channel is arranged aiming at the first section of air channel, the second section of air channel is formed by a horizontal space positioned at the top of the interlayer space, and the second section of air channel is communicated with the first section of air channel.

8. In the above scheme, a third air duct is provided for the second air duct, the third air duct is formed by a section of interlayer space extending downwards from the top of the interlayer space, and the third air duct is communicated with the second air duct.

9. In the above scheme, a fourth air duct is provided for the third air duct, the fourth air duct is formed by a cooling air inlet provided at the side of the fan housing, and the fourth air duct is turned into the space of the inner housing.

In order to achieve the purpose, the oxygen concentrator adopts the technical scheme that: an oxygen concentrator, its innovation lies in: the shell of the oxygen concentrator adopts the shell of the oxygen concentrator in the technical scheme.

The relevant content in the above technical solution is explained as follows:

1. in the above aspect, the oxygen concentrator includes an air compressor, an adsorption tower assembly, a centrifugal fan, a condenser tube, and an air intake filter, wherein the air compressor, the adsorption tower assembly, the centrifugal fan, and the condenser tube are positioned in the inner housing, and the air intake filter is positioned in the interlayer space between the outer housing and the inner housing. The gas path connections of the air compressor, the adsorption tower assembly and the condenser tube are known to those skilled in the art and thus will not be described in detail herein.

2. In the above scheme, the air compressor is positioned in the inner cover of the inner shell, the centrifugal fan and the condenser pipe are positioned in the air cover of the inner shell, and the adsorption tower assembly is positioned in the suction cover of the inner shell.

The design principle and the technical concept of the invention are as follows: in order to solve the functional problems, the performance problems and the manufacturability problems of the original oxygen concentrator caused by unreasonable design of a shell, the invention adopts the following technical measures: first, the oxygen concentrator housing is designed as a double-layered hollow housing consisting of an outer housing and an inner housing. The shell can reduce noise by using a double-layer hollow structure to achieve a good sound insulation effect, and can use an interlayer space between the outer shell and the inner shell as a part of a cooling air duct. Secondly, come reasonable planning inner space through the combination of shell body and interior casing, be about to the inner space design of oxygen concentrator is become the space design by first cavity, second cavity, third cavity and fourth cavity constitution at least, not only has fixed position relation between these cavities, but also has specific function and usage to embody the rationality of spatial arrangement. Thirdly, the outer shell is designed to mainly comprise a front shell, a rear shell and a base, and the inner shell is designed to mainly comprise a suction hood, a fan cover and an inner hood, so that the outer shell and the inner shell have assembling relations of splicing and combining from the assembling angle, the manufacturability during manufacturing can be improved, and the assembly becomes simple, convenient and reliable. Fourthly, the shape and the opening direction of each cover body (namely the suction cover, the wind cover and the inner cover) and the combination among the cover bodies are designed on the inner shell, and the overall structural strength of the inner shell and the strength of each part for supporting functional parts are fully considered. Fifthly, besides the functions, the performance and the characteristics are ensured in the design of the shell, the cooling air duct is specially designed, at least three bent channels are adopted on an air flow path in the design of the cooling air duct, the length of the air duct is lengthened, and the kinetic energy of the air flow is reduced by bending the bent channels, so that the cooling effect is ensured, the noise can be further reduced, and the rationality of the air duct design is embodied. In summary, the present invention provides an improved design of an oxygen concentrator housing from multiple angles to further enhance the optimal combination of the housing. But it is emphasized that the technical core of the invention lies in: firstly, a shell adopts a double-layer hollow design; second, the airflow channel design on the housing. Secondly, the space layout design inside the shell and the convenient design of assembly.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:

1. the oxygen concentrator shell mainly comprises a front shell, a rear shell, a base, a suction hood, a fan cover and an inner cover, wherein all parts of the shell are convenient to assemble, the structure is novel and exquisite, the spatial layout design is reasonable, the overall strength is high, the manufacturing cost is relatively low, the mass industrial production is facilitated, and the economic benefit is obvious.

2. The oxygen concentrator shell adopts a double-layer hollow design, so that the noise generated during working can be obviously reduced, and a good sound insulation effect is achieved.

3. The invention designs the elongated special cooling air duct at least comprising three bent channels by utilizing a plurality of cavity spaces and combining the interlayer space and the base space, effectively isolates and reduces the noise in the shell, the average A weighted sound pressure level value tested reaches about 40dB, the average A weighted sound pressure level value is about 12dB lower than that of an oxygen concentrator on the market, and the noise reduction effect is very obvious.

4. According to the invention, through the design of the air inlet and outlet channel and the heat dissipation channel, the air inlet and exhaust noise is skillfully reduced, good heat dissipation is kept, the concentration of oxygen product gas is improved, and the stability of the whole system is ensured.

5. The oxygen generation component is installed and fixed by skillfully utilizing the self structure in the shell, does not need additional parts, has simple design and convenient operation, and is convenient for automatic production.

Drawings

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic diagram of the operation of the gas circuit according to the embodiment of the present invention;

FIG. 4 is a perspective view of a first perspective of an embodiment of the present invention (the view is designated as a reference view of the housing of the present invention in use);

FIG. 5 is a perspective view from a second perspective of an embodiment of the present invention;

FIG. 6 is a schematic view of the air flow path of the air inlet channel according to the embodiment of the present invention;

FIG. 7 is a perspective view of a base in accordance with an embodiment of the present invention;

FIG. 8 is a perspective view of a suction cup according to an embodiment of the present invention;

FIG. 9 is a perspective view of a hood in accordance with an embodiment of the present invention;

FIG. 10 is a perspective view of an inner cover in accordance with an embodiment of the present invention;

FIG. 11 is a top view of an inner cover in accordance with an embodiment of the present invention;

FIG. 12 is an internal construction view of the embodiment of the invention with the outer casing removed;

FIG. 13 is an assembled perspective view of the base, support plate and compressor in accordance with an embodiment of the present invention;

FIG. 14 is a longitudinal cross-sectional view of a base and support plate according to an embodiment of the present invention;

fig. 15 is a perspective view of the inner structure of the fan housing and the housing removed according to the embodiment of the present invention.

In the above drawings: 1. a front housing; 2. a rear housing; 3. a filter cover; 4. a base; 5. a suction hood; 6. a fan housing; 7. an inner cover; 8. a gas storage tank; 9. a support plate; 10. a circuit board; 11. a front shell handle; 12. a condenser tube; 13. a centrifugal fan; 14. an electromagnetic valve; 15. an adsorption column assembly; 16. a switching valve; 17. an adsorption tower gas inlet; 18. a nitrogen outlet of the adsorption tower; 19. an air compressor; 101. an oxygen outlet; 102. an atomizing port; 103. a flowmeter display window; 104. a remote control receiving window; 105. a flow adjustment knob; 106. a caster wheel; 107. a display screen; 108. a front housing attachment hole; 109. supporting ribs; 110. opening an air inlet; 20. an air inlet; 21. an air inlet filter cover; 22. a power switch; 23. rain sheltering eaves; 24. a humidification bottle fixing groove; 25. a rear housing attachment hole; 26. a rear shell handle; 31. a first cavity; 32. a second cavity; 33. a third cavity; 34. a fourth cavity; 35. a fifth cavity; 36. a sixth cavity; 37. an exhaust muffler; 38. an intake air filter; 40. a base first connection hole; 41. an exhaust gas outlet; 42. a first limiting rib of the base; 43. a second limiting rib of the base; 44. a third connecting hole of the base; 45. a third limiting rib of the base; 46. a base first partition; 47. a gate hole; 48. a base convex edge; 401. a base second connecting hole; 402. a fourth connecting hole of the base; 403. a base second partition; 404. a base third partition; 405. a fourth base partition; 406. a fifth partition of the base; 407. a sixth base partition; 51. a suction hood first connection hole; 52. the left end surface of the suction hood; 53. a first limiting rib of the suction cover; 54. a suction hood second connection hole; 55. a suction hood limiting upright post; 56. a suction hood third connection hole; 57. the lower end surface of the suction hood; 58. a second limiting rib of the suction cover; 59. a suction hood limiting groove; 61. a first connection hole of the fan cover; 62. the right end surface of the fan cover; 63. the lower end surface of the fan cover; 64. a second connecting hole of the fan cover; 65. an air duct bifurcation; 66. a cooling air inlet; 70. a condenser tube orifice; 71. the first limiting rib of the inner cover; 72. a circuit board support rib; 73. a circuit board limiting rib; 74. the inner cover is provided with a second connecting hole; 75. a first connection hole of the inner cover; 76. a top surface reinforcing rib; 77. a third connecting groove of the inner cover; 78. a third connecting hole of the inner cover; 79. a wire harness limiting post; 701. reinforcing ribs of the inner cover; 702. a fourth groove of the inner cover; 703. a fifth limiting groove of the inner cover; 704. the right end face of the inner cover; 705. a fourth connecting hole of the inner cover; 80. a fan mounting upright post; 81. limiting ribs of the condensation pipe; 82. an air outlet end bayonet; 83. a fan limiting buckle; 84. a first support rib of the fan; 85. a fan cover limiting rib; 86. the air inlet pipeline is provided with a hole; 87. opening a hole in the exhaust pipeline; 88. a second support rib of the fan; 91. a first connecting hole of the support plate; 92. the rear shell is connected with the clamping seat; 93. inner cover limit ribs; 94. the front shell is connected with the clamping seat; 95. a cooling air outlet; 96. exhaust muffler limit ribs; 97. a concave-convex platform; 98. a first separator; 99. concave edges.

Detailed Description

The invention is further described with reference to the following figures and examples:

example 1: oxygen concentrator casing

As shown in fig. 1 and 4-15, the oxygen concentrator casing is composed of an outer casing and an inner casing (see fig. 1), the inner casing is located in the space of the outer casing and is separated from the outer casing at a distance from the side and the top (see fig. 1), so as to form a double-layer hollow casing structure, wherein:

the outer housing is mainly composed of a front housing 1, a rear housing 2 and a base 4 (see fig. 4), wherein the front housing 1 is located at the front, the rear housing 2 is located at the back and the base 4 is located at the bottom, with reference to the oxygen concentrator housing in the use state (fig. 4 designates the housing use state reference figure of the present invention). The front shell 1 and the rear shell 2 are both concave shell structures, the front shell 1 and the rear shell 2 are oppositely spliced in the front and rear directions to form the side part and the top part of the outer shell in an assembling state, the base 4 is of a base body structure (see fig. 7, 12 and 14), and the base 4 is spliced with the front shell 1 and the rear shell 2 in the up and down directions to form the bottom part of the outer shell.

The inner shell mainly comprises a suction hood 5 (shown in figure 8), a wind cover 6 (shown in figure 9) and an inner cover 7 (shown in figure 10), wherein the suction hood 5 is positioned on one side of the left side and the right side, the wind cover 6 and the inner cover 7 are positioned on the other side (shown in figure 12), the wind cover 6 is positioned on the upper part of the other side, and the inner cover 7 is positioned on the lower part of the other side (shown in figure 12). The suction hood 5 is of a hood structure (see fig. 8), the bottom and the wall surface of one side of the suction hood are opened to form an open end, the wind shield 6 and the inner hood 7 are both of the hood structure (see fig. 9 and 10), the bottom of the suction hood 5 is opened to form an open end, the bottom open ends of the wind shield 6 and the inner hood 7 are both downward in an assembly state, the bottom open end of the wind shield 6 is spliced on the top of the inner hood 7, the open end of one side of the suction hood 5 is simultaneously spliced with the side portions of the wind shield 6 and the inner hood 7, so that the combination of the wind shield 6 and the inner hood 7 and the suction hood 5 are arranged in parallel on the left side and the right side, and the bottom open ends of the wind shield 6 and the suction hood 5 are spliced.

An air inlet 20 (shown in fig. 4) is arranged at one side of the outer shell, an exhaust gas outlet 41 (shown in fig. 14) is arranged at the other side of the outer shell, an interlayer space between the outer shell and the inner shell is defined as a first cavity 31 (shown in fig. 6), an internal space of the suction hood 5 is defined as a second cavity 32 (shown in fig. 12), an internal space of the wind hood 6 is defined as a third cavity 33 (shown in fig. 12), and an internal space of the inner hood 7 is defined as a fourth cavity 34 (shown in fig. 12), wherein the first cavity 31 is mainly used for sound insulation, the second cavity 32 is mainly used for adsorption, the third cavity 33 is mainly used for forced air supply, the fourth cavity 34 is mainly used for preparing compressed air, the air inlet 20 is communicated with the first cavity 31, the first cavity 31 is communicated with the third cavity 33, the third cavity 33 is communicated with the fourth cavity 34, and the fourth cavity 34 is communicated with the exhaust gas outlet 41, and sequentially passes through the first, The third chamber 33, the fourth chamber 34 to the exhaust outlet 41 form a cooling air duct (see fig. 1).

The top of the base 4 is provided with a supporting plate 9 (see fig. 12), the supporting plate 9 is of a plate-shaped structure, the base 4 is provided with a concave cavity, the supporting plate 9 is positioned at the top of the base 4 and covers the top end of the concave cavity (see fig. 14), the exhaust gas outlet 41 is arranged at the side part of the base 4 (see fig. 14), the fourth cavity 34 is communicated with the concave cavity of the base 4, and the concave cavity of the base 4 is communicated with the exhaust gas outlet 41. A first base partition plate 46 (see fig. 7 and 14) is arranged in the cavity of the base 4, the first base partition plate 46 is a plate body and is arranged in the cavity in the vertical direction, a grid hole 47 (see fig. 7 and 14) is arranged on the first base partition plate 46, the first base partition plate 46 divides the space of the cavity into two parts, one of the two parts is defined as a fifth cavity 35 (see fig. 7), the other part is defined as a sixth cavity 36 (see fig. 7), the fifth cavity 35 is communicated with the fourth cavity 34, the fifth cavity 35 is communicated with the sixth cavity 36 through the grid hole 47, and the sixth cavity 36 is communicated with the exhaust outlet 41. The horizontal section of the first base partition plate 46 is a door frame-shaped partition plate (see fig. 7), the door frame-shaped partition plate divides the cavity space into a central fifth cavity 35 and a peripheral sixth cavity 36, and the fifth cavity 35 and the sixth cavity 36 form a horizontal circulation air duct in the cavity of the base 4.

The air inlet 20 is arranged at the side parts of the front shell 1 and the rear shell 2 (see fig. 4), two first limiting ribs 53 of the suction hood are arranged between the suction hood 5 and the front shell 1 and the rear shell 2 aiming at the air inlet 20 (see fig. 8), the two first limiting ribs 53 of the suction hood are positioned in the interlayer space between the outer shell and the inner shell and are arranged in parallel in the up-down direction, and a first section of air duct (see fig. 6) from the air inlet 20 to the top of the interlayer space through the air inlet opening hole 110 is formed. A filter screen is provided between the filter cover 3 and the intake opening 110 to primarily filter air entering the interior of the housing.

And a second section of air channel is arranged aiming at the first section of air channel, the second section of air channel is formed by a horizontal space positioned at the top of the interlayer space (see figure 6), and the second section of air channel is communicated with the first section of air channel. And a third section of air duct is arranged aiming at the second section of air duct, the third section of air duct is formed by a section of interlayer space which extends downwards from the top of the interlayer space (see figure 1), and the third section of air duct is communicated with the second section of air duct. A fourth air duct is provided for the third air duct, the fourth air duct is formed by a cooling air inlet 66 (see fig. 9) provided at the side of the fan housing 6, and the fourth air duct is diverted into the third cavity 33.

Example 2: oxygen concentrator

As shown in fig. 1 to 15, the oxygen concentrator includes a housing, an air compressor 19, an adsorption tower assembly 15, an air storage tank 8, a centrifugal fan 13, a condenser tube 12, and an intake filter 38, wherein the housing is composed of an outer housing and an inner housing (see fig. 1), the inner housing is located in a space of the outer housing and is spaced apart from the outer housing at a distance from a side and a top (see fig. 1) to form a double-layered hollow housing structure, the outer housing is mainly composed of a front housing 1, a rear housing 2, and a base 4 (see fig. 4), and the inner housing is mainly composed of a suction hood 5 (see fig. 8), a wind hood 6 (see fig. 9), and an inner hood 7 (. In this embodiment, the housing of the oxygen concentrator is the same as that of embodiment 1, and the description thereof will not be repeated.

The front shell 1, the rear shell 2 and the base 4 are fixed together by means of, but not limited to, a socket structure, a snap structure, screws or glue to form a complete shell. The illustrated housing is provided with an air inlet 20 (see fig. 4) and an exhaust outlet 41 (see fig. 7), the suction hood 5, the wind shield 6, the inner hood 7 and the support plate 9 are arranged inside the outer housing to form a plurality of cavities, such as a first cavity 31, a second cavity 32, a third cavity 33 and a fourth cavity 34, wherein the first cavity 31 is formed by a gap between the outer housing and the inner housing.

The front shell 1 and the rear shell 2 are respectively positioned at the front side and the rear side of the shell, the shapes of the front shell and the rear shell are basically and symmetrically arranged, and all oxygen generation assemblies are placed in the shell. The two sides below the front shell 1 are respectively clamped on the front shell connecting clamping seat 94 (see fig. 13) of the supporting plate 9 and the fourth base partition plate 405 (see fig. 7) of the base 4 by fasteners, the two sides below the rear shell 2 are respectively clamped on the rear shell connecting clamping seat 92 (see fig. 13) of the supporting plate 9 and the third base partition plate 404 (see fig. 7) of the base 4 by fasteners, and the rest positions of the front shell 1 and the rear shell 2 are connected together by the front shell connecting hole 108 (see fig. 6) and the rear shell connecting hole 25 (see fig. 5).

The outer side of the front shell 1 is provided with an oxygen outlet 101, an atomization port 102, a display screen 107, a flowmeter display window 103, a remote control receiving window 104, a flow adjusting knob 105, a front shell handle 11 and an air inlet 20 (see fig. 4).

The oxygen outlet 101 provided in the front case 1 is an oxygen outlet connector of the oxygen concentrator. Display screen 107 is used to display the operating status of the oxygen concentrator. The flow meter display window 103 is used to display the flow rate of oxygen. The atomization port 102 is communicated with an air outlet joint pipeline of the air compressor 19, and compressed air can be provided for an externally connected atomization assembly to carry out atomization or humidification.

The outer side of the rear shell 2 is provided with a rear shell handle 26, an air inlet filter cover 21, an air inlet 20, a power switch 22, a rain sheltering brim 23 and a humidification bottle fixing groove 24 (see fig. 5), the rear of the air inlet filter cover 21 is provided with an air inlet filter 38, one end of the air inlet filter 38 is connected with the first cavity 31, and the other end of the air inlet filter 38 is connected with an air inlet joint of the air compressor 19 through a pipeline. The humidification bottle fixing groove 24 is used for placing a humidification bottle, and the rain-proof eaves 23 can prevent water from entering the power switch 22 under the test condition of IP 21.

The air inlet 20 is located in the left middle of the outer housing (see fig. 4), the oxygen concentrator is fed from the air inlet 20, the exhaust outlet 41 is located at the right end of the base 4 (see fig. 7), and the oxygen concentrator is discharged from the exhaust outlet 41. The air inlet 20 (see fig. 4) of the whole device is arranged below the filter cover 3, a series of rectangular air inlet openings 110 are arranged on the filter cover 3, the openings can be formed by a plurality of ellipses, circles or rectangles, the filter cover 3 (see fig. 6) is clamped by the supporting ribs 109, the filter cover 3 is prevented from falling off, and a filter screen is arranged between the filter cover 3 and the air inlet openings 110 and is used for primary filtering of air entering the shell.

The support plate 9 is fixed to the base 4 (see fig. 12), and the inner cover 7, the support plate 9, and the base 4 are connected together through six support plate first connection holes 91 (see fig. 13) and fixed to the base first connection hole 40 (see fig. 7). The air compressor 19 is mounted on the concave-convex platform 97 in a spring up-and-down floating mode (see fig. 13), the bottom of the spring is provided with a silica gel shock pad, the exhaust silencer 37 is fixed on the support plate 9 through an exhaust silencer limiting rib 96 (see fig. 13), the concave edge 99 (see fig. 14) of the first partition plate 98 (see fig. 14) is matched and assembled with the base convex edge 48 (see fig. 14) of the base first partition plate 46, and the space is divided into the fifth cavity 35 and the sixth cavity 36 (see fig. 7) on the base 4.

The inner cover 7 is fixed to the support plate 9 and the base 4 through the inner cover first connection hole 75 (see fig. 11) and connected to the support plate first connection hole 91 (see fig. 13), and the end of the inner cover 7 is clamped to the inner cover limit rib 93 (see fig. 13) of the support plate 9. The upper end face of the inner cover 7 is provided with a centrifugal fan 13 and a condenser pipe 12 (see fig. 15), an air outlet of the centrifugal fan 13 is positioned in an air outlet end bayonet 82 (see fig. 11), one end of the centrifugal fan 13 is supported on two fan first supporting ribs 84 (see fig. 11), an orifice of the centrifugal fan 13 is clamped by a fan mounting column 80 (see fig. 11), the other end projection of the centrifugal fan 13 is clamped by a fan limiting buckle 83 (see fig. 11), and an air outlet of the centrifugal fan 13 is supported on a fan second supporting rib 88 (see fig. 11). The main control board is supported by the circuit board support ribs 72 (see fig. 11), and the two sides are limited by the circuit board limiting ribs 73 (see fig. 11), so that the degrees of freedom of the main control board in five directions are limited. The intake silencer is fixed below the third connecting groove 77 (see fig. 11) of the inner cover, and can be further used

The screw is fixed inside the inner cover 7 through the inner cover third coupling hole 78 (see fig. 11). The gas travels along the pipeline through the inlet pipeline opening 86 (see fig. 11) into the inlet of the air compressor 19. The air outlet of the air compressor 19 is connected with the condenser pipe 12, the condenser pipe 12 passes through the condenser pipe orifice 70 (see fig. 11) to be connected with the air inlet of the adsorption tower assembly 15, the upper end face of the inner cover 7 is attached to the condenser pipe by means of the deformation of the silicone tube, and the tail end of the condenser pipe 12 is limited by a pair of condenser pipe limiting ribs 81 (see fig. 11). The front and top surfaces of the inner cover 7 are reinforced by the inner cover reinforcing ribs 701 (see fig. 10) and the top surface reinforcing ribs 76 (see fig. 11), respectively, so that the strength of the inner cover 7 when the whole machine falls is ensured. The internal harness passes through the harness restraint post 79 (see fig. 11), the nitrogen discharge port of the adsorption tower assembly 15 passes through the exhaust pipe opening 87 (see fig. 11) and enters the exhaust silencer 37 (see fig. 13), the capacitor of the air compressor 19 is adhered to the inner cover fourth groove 702 (see fig. 10) by foam glue, and the inner cover fourth groove 702 is made according to the appearance of the capacitor. The air reservoir 8 (see fig. 6) is seated on two ribs of the third stopper rib 45 (see fig. 7) of the base. The adsorption tower assembly 15 is placed on the base 4, and the second limiting rib 43 (see fig. 7) of the base plays a role in positioning. A silicone tube with a proper length is placed in the middle of the first limiting rib 42 (see fig. 7) of the base, and the adsorption tower assembly 15 is pressed above the silicone tube and is not in direct contact with the base.

The suction hood 5 is installed inside the outer shell in a mode shown in the drawing, the suction hood 5 is connected with the base third connecting hole 44 (see fig. 7) on the base 4 through the suction hood third connecting hole 56 (see fig. 8), and is fixed on the inner hood fourth connecting hole 705 (see fig. 10) of the inner hood 7 through the suction hood second connecting hole 54 (see fig. 8), the suction hood first limiting rib 53 (see fig. 8), the front shell 1 and the rear shell 2 form a first section of air duct, so that air entering the air inlet 20 can only flow upwards along a space between two ribs (two suction hood first limiting ribs 53) of the suction hood 5. The suction hood 5 is connected with a first fan cover connecting hole 61 (shown in figure 9) of the fan cover 6 through a first suction hood connecting hole 51 (shown in figure 8), the left suction hood end face 52 (shown in figure 8) and the right air hood end face 62 (shown in figure 9) are overlapped with the right inner cover end face 704 (shown in figure 10) (shown in figure 12), the suction hood limiting groove 59 limits the upward movement space (shown in figure 15) of the adsorption tower assembly 15, the suction hood second limiting rib 58 limits the peripheral movement of the adsorption tower assembly 15 according to the appearance design of the adsorption tower assembly 15, the suction hood limiting upright post 55 is matched with the fifth inner cover limiting groove 703 on the inner cover 7 to clamp the suction hood on the inner cover 7, the suction hood 5 is connected with the inner cover 7, the bottom plate 4 and the fan cover 6, and the connection strength and reliability of the whole device are improved. The suction hood 5 coincides with the fifth partition 406 (see fig. 7) of the base, and forms an enclosure space to limit the front-back and left-right movement of the adsorption tower assembly 15.

The fan housing 6 is installed inside the outer housing in a mode shown in the drawing, the fan housing 6 is fixed on the inner housing 7 through the fan housing second connecting hole 64 (see fig. 9) and is connected with the inner housing second connecting hole 74 (see fig. 11) (see fig. 12), two reinforcing ribs (see fig. 9) are arranged around each fan housing second connecting hole 64, the lower end face 63 of the fan housing is overlapped with the upper end face of the inner housing 7 (see fig. 12), and the opening end of the fan housing 6 is clamped between the fan housing limiting ribs 85 on the upper end face of the inner housing 7 (see fig. 11). The cooling air inlet 66 (see fig. 9) is the air inlet of the third cavity 33 and all subsequent cavities, the air duct branch 65 of the fan housing 6 divides the cooling air inlet 66 into two parts (see fig. 9), the tail end of the cooling air inlet is inserted into the first limiting rib 71 (see fig. 11) of the inner cover, and the area of the cooling air inlet 66 is designed to be slightly smaller than the area of the air inlet of the whole machine.

The front case 1 and the rear case 2 are assembled in the following relationship: the base 4, the support plate 9, and the rear case 2 are coupled together through two base fourth coupling holes 402 (see fig. 7), and the base 4, the support plate 9, and the front case 1 are coupled together through two base second coupling holes 401 (see fig. 7).

The suction hood 5, the wind hood 6 and the inner hood 7 can be made of insulating plastic materials, and the support plate 9 can be made of insulating plastic materials or metal plates.

In operation, the centrifugal fan 13 rotates to cause an air flow to flow from the third chamber 33 into and out of the fourth chamber 34, cooling the air compressor 19 from top to bottom, and simultaneously the fan of the air compressor 19 itself sucks air from both sides from the cooling air outlet 95 (see fig. 13) into the fifth chamber 35 (see fig. 14), moves to the right along the base first partition 46 (see fig. 7), and is split to both sides by the grid holes 47 into the sixth chamber 36 (see fig. 7). The sixth chamber 36 is formed by the base first partition 46, the base second partition 403, the base sixth partition 407 (see fig. 7), and the first partition 98 (see fig. 14), and the gas is discharged from the exhaust gas outlet 41 after bypassing one round. The exhaust gas outlet 41 is composed of a plurality of oval, circular or rectangular shapes.

The second cavity 32 is composed of the inner space of the suction hood 5, the adsorption tower assembly 15 (see fig. 15) is placed in the second cavity 32, a base second limiting rib 43 (see fig. 7) which is similar to the adsorption tower assembly 15 in appearance is arranged on the base 4, the left and right movement of the adsorption tower assembly 15 is limited, an elastic body is placed between the base first limiting ribs 42, the adsorption tower assembly 15 is placed on the elastic body, meanwhile, a suction hood limiting groove 59 (see fig. 8) which is a small distance away from the top end of the adsorption tower assembly 15 is arranged at the top end of the suction hood 5, the up-and-down movement of the adsorption tower assembly 15 is limited, the movement distance of the adsorption tower assembly 15 in the second cavity 32 is limited, and the effect of reducing the vibration transmission of the base 4 is achieved.

The third cavity 33 is formed by the inner space of the fan cover 6, the condenser pipe 12 and the two centrifugal fans 13 (see fig. 15) are arranged in the third cavity 33, the air valve of the adsorption tower assembly 15 is also arranged in the third cavity 33, and the second cavity 32 is communicated with the third cavity 33. Because the centrifugal fan 13 can generate a large wind pressure and a large wind volume, the air enters the first cavity 31 from the air inlet 20 under the suction force of the fan (see fig. 6), enters the third cavity 33 from the cooling air inlet 66 along the path of the first cavity 31, and simultaneously cools the electromagnetic valve 14 in the second cavity 32 and the condenser pipe 12 in the third cavity 33, enters the fourth cavity 34 after entering the centrifugal fan 13 from the axial direction, and cools the air compressor 19 from top to bottom.

The fourth cavity 34 is composed of the inner space of the inner cover 7, the air compressor 19, the exhaust silencer 37 and the intake silencer are arranged in the fourth cavity 34, and the air compressor 19 is arranged on the concave-convex platform 97 of the supporting plate 9 according to the technical scheme with the own patent number ZL201822230204.0 of the company (see figure 13). The intake silencer is clamped on the inner shell through the deformation of the plastic piece and is fixed on the inner cover 7 through the third connecting hole 78 of the inner cover. The gas from the third chamber 33 cools the air compressor 19 from top to bottom within the fourth chamber 34 and then enters the fifth chamber 35 through the cooling air outlet 95 of the support plate 9 (see fig. 13).

The fifth cavity 35 is formed by enclosing a support plate 9, a first base partition plate 46 and the bottom surface of the base 4 (see fig. 7), the gas moves rightwards along the first base partition plate 46 and enters the sixth cavity 36 after passing through a grid hole 47 on the first base partition plate 46, the sixth cavity 36 is formed by enclosing the first base partition plate 46, a second base partition plate 403, a sixth base partition plate 407, the support plate 9 and the bottom surface of the base 4 (see fig. 7), the fifth cavity 35 is communicated with the sixth cavity 36 through an upper grid hole 47 arranged on the first base partition plate 46, the sixth cavity 36 is communicated with the external space through an exhaust gas outlet 41 arranged on the base 4, and the exhaust gas outlet 41 of the whole machine is arranged at the end part of the sixth cavity 36 (see fig. 7).

The air used for cooling in the present embodiment enters the housing from the air inlet 20 as shown in fig. 1, flows through the cooling air duct as designed, and is finally discharged from the exhaust outlet 41. The air duct design can effectively dissipate heat inside the shell, simultaneously prolongs the length of an airflow air path passage for air entering the shell, and effectively isolates, reduces and absorbs noise of noise sources such as airflow inside the shell, the air compressor 19, the electromagnetic valve 14, the adsorption tower assembly 15, the air inlet silencer and the exhaust silencer 37.

FIG. 3 is a schematic diagram of the operation of the oxygen generation gas path of the oxygen concentrator of the embodiment. The combined air valve, pressure regulating valve, filter, flowmeter and humidifier in the figure are all the prior art. It should be noted that fig. 3 is a schematic diagram of the operation of the oxygen generation gas circuit, not the operation of the cooling air, and the schematic diagram of the operation of the cooling air of the oxygen concentrator of this embodiment is shown in fig. 1.

The front shell 1 and the rear shell 2 can be fixedly connected by means of a sleeve structure, a snap structure, screws, glue, or the like. For example, the front shell 1 is provided with a socket, the rear shell 2 is provided with a sleeve, and the sleeve can be inserted into the socket and correspondingly matched with the socket, so that the socket is assembled into a socket structure. Of course, the sleeve structure may be a sleeve member on the rear shell 2 and a sleeve on the front shell 1. Other fixing modes such as a buckle structure and the like can also be arranged in the same way.

Preferably, a rib position is arranged below the supporting plate 9 and a rib position on the base 4 form a fifth cavity 35 and a sixth cavity 36, the fifth cavity 35 is arranged on the inner side, the sixth cavity 36 is arranged on the outer side, the fifth cavity 35 on the inner side can also be communicated with the outer space of the shell device, the exhaust gas outlet 41 of the base 4 is arranged on the fifth cavity 35, the sixth cavity 36 on the outer side is not communicated with the outside, the spaces of the sixth cavity 36 and the fourth cavity 34 are communicated through an opening on the supporting plate 9, a grid hole 47 is arranged at the tail end of a partition plate of the base 4, and the grid hole 47 is far away from the position of the opening on the supporting plate 9, so that the heat dissipation and noise reduction effects of the base 4 can be achieved.

Other embodiments and structural variations of the present invention are described below:

1. in the above embodiments 1 and 2, the outer casing is composed of the front casing 1, the rear casing 2 and the base 4 (see fig. 4), but the present invention is not limited to this, and the outer casing may be designed in a structure form of splicing the upper casing and the lower casing, or in a structure form of splicing the cover casing and the base, and has the same technical effects. As would be readily understood and accepted by those skilled in the art.

2. In the above embodiments 1 and 2, the inner housing is mainly composed of the suction hood 5 (see fig. 8), the wind shield 6 (see fig. 9) and the inner housing 7 (see fig. 10), but the present invention is not limited to this, and the inner housing may also be designed such that the front inner housing and the rear inner housing are formed by a front-rear spliced structure, and have the same technical effects. As would be readily understood and accepted by those skilled in the art.

In summary, the technical core of the present invention is: firstly, a shell adopts a double-layer hollow design; second, the airflow channel design on the housing. Secondly, the space layout design inside the shell and the convenient design of assembly.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An oxygen concentrator housing, comprising: including the shell body and be used for holding adsorption tower subassembly (15), fan and air compressor (19) interior casing, interior casing is located the space of shell body to be separated a distance at the side or/and top with the shell body, with this formation double-deck hollow shell structure, wherein:

the outer shell is provided with an air inlet (20) and an exhaust gas outlet (41), and the inner shell is provided with a cooling air inlet (66) and a cooling air outlet (95);

the air inlet (20) is positioned on one side of the outer shell, the exhaust gas outlet (41) is positioned on the other side of the outer shell, and the cooling air inlet (66) is positioned on one side of the inner shell far away from the air inlet (20) by taking the use state of the shell as reference; the air inlet (20) is communicated with the cooling air inlet (66) through an interlayer space between the outer shell and the inner shell, and the cooling air outlet (95) is communicated with the exhaust gas outlet (41); a channel is formed from the air inlet (20) to the exhaust gas outlet (41) in sequence in the assembly state through the interlayer space, the cooling air inlet (66), the space of the inner shell, the cooling air outlet (95), and in the working state, cooling air is discharged from the exhaust gas outlet (41) after passing through the air inlet (20), the interlayer space, the cooling air inlet (66), the space of the inner shell and the cooling air outlet (95) in sequence.

2. The oxygen concentrator housing of claim 1, wherein: the outer shell mainly comprises a front shell (1), a rear shell (2) and a base (4), and by taking the oxygen concentrator shell in a use state as a reference, the front shell (1) is positioned on the front side, the rear shell (2) is positioned on the back side, and the base (4) is positioned at the bottom; preceding shell (1) and backshell (2) are concave shell structure, and preceding shell (1) and backshell (2) are in the front and back direction to closing the concatenation under the assembled condition and form the lateral part and the top of shell body, and base (4) are the pedestal structure, and base (4) are in the upper and lower direction and preceding shell (1) and backshell (2) concatenation form the bottom of shell body.

3. The oxygen concentrator housing of claim 1, wherein: the inner shell mainly comprises a suction hood (5), a wind hood (6) and an inner cover (7), and by taking the shell of the oxygen concentrator in a use state as reference, the suction hood (5) is positioned on one of the left side and the right side, the wind hood (6) and the inner cover (7) are positioned on the other side, wherein the wind hood (6) is positioned on the upper part of the other side, and the inner cover (7) is positioned on the lower part of the other side; the suction hood (5) is of a hood body structure, the bottom and the wall surface of one side of the suction hood are opened to form an open end, the wind hood (6) and the inner hood (7) are both of the hood body structure, the bottom of the suction hood is opened to form an open end, the bottom open ends of the wind hood (6) and the inner hood (7) are downward in an assembly state, the bottom open end of the wind hood (6) is spliced on the top of the inner hood (7), the open end of one side of the suction hood (5) is simultaneously spliced with the side parts of the wind hood (6) and the inner hood (7), so that the combination of the wind hood (6) and the inner hood (7) and the suction hood (5) are arranged in parallel on the left side and the right side, and the bottom open ends of the wind hood (6) and the suction hood (5) are spliced on the base (.

4. The oxygen concentrator housing of claim 2, wherein: the exhaust gas purification device is characterized in that a supporting plate (9) is arranged at the top of the base (4), the supporting plate (9) is of a plate-shaped structure, a concave cavity is formed in the base (4), the supporting plate (9) is located at the top of the base (4) and covers the top end of the concave cavity, the exhaust gas outlet (41) is formed in the side portion of the base (4), and the concave cavity of the base (4) is communicated with the exhaust gas outlet (41).

5. The oxygen concentrator housing of claim 4, wherein: the exhaust gas purification device is characterized in that a first base partition plate (46) is arranged in a concave cavity of the base (4), the first base partition plate (46) is a plate body and is arranged in the concave cavity in the vertical direction, grid holes (47) are formed in the first base partition plate (46), the first base partition plate (46) divides the space of the concave cavity into two parts, one part of the space is communicated with the space of the inner shell, the other part of the space is communicated with the other part of the space through the grid holes (47), and the other part of the space is communicated with the exhaust gas outlet (41).

6. The oxygen concentrator housing of claim 5, wherein: the horizontal section of the first base partition plate (46) is a door frame-shaped partition plate, the door frame-shaped partition plate divides the cavity space into a central part of space and a peripheral part of space, and the part of space and the other part of space form a horizontal circulation air duct in the cavity of the base (4).

7. The oxygen concentrator housing of claim 1, wherein: air inlet (20) establish the lateral part at preceding shell (1) or rear shell (2), are equipped with two first spacing muscle (53) of suction hood to air inlet (20) between suction hood (5) and preceding shell (1) or rear shell (2), and two first spacing muscle (53) of suction hood are located the intermediate layer space between shell body and the interior casing and parallel arrangement in the upper and lower direction, form the first section wind channel that upwards reaches the intermediate layer space top from air inlet (20).

8. The oxygen concentrator housing of claim 7, wherein: and a second section of air channel is arranged aiming at the first section of air channel, is formed by a horizontal space positioned at the top of the interlayer space and is communicated with the first section of air channel.

9. The oxygen concentrator housing of claim 8, wherein: and a third section of air duct is arranged aiming at the second section of air duct, the third section of air duct is formed by a section of interlayer space which extends downwards from the top of the interlayer space, and the third section of air duct is communicated with the second section of air duct.

10. The oxygen concentrator housing of claim 9, wherein: and a fourth air duct is arranged aiming at the third air duct and is formed by a cooling air inlet (66) arranged at the side part of the fan cover (6), and the fourth air duct is transferred into the space of the inner shell.

11. An oxygen concentrator, comprising: the oxygen concentrator comprises an oxygen concentrator housing according to any one of claims 1 to 10.

12. The oxygen concentrator of claim 11, wherein: the air-conditioning system comprises an air compressor (19), an adsorption tower assembly (15), a centrifugal fan (13), a condensation pipe (12) and an air inlet filter (38), wherein the air compressor (19), the adsorption tower assembly (15), the centrifugal fan (13) and the condensation pipe (12) are positioned and arranged in an inner shell, and the air inlet filter (38) is positioned and arranged in a sandwich space between an outer shell and the inner shell.

13. The oxygen concentrator of claim 12, wherein: the air compressor (19) is positioned in an inner cover (7) of the inner shell, the centrifugal fan (13) and the condenser pipe (12) are positioned in a wind cover (6) of the inner shell, and the adsorption tower assembly (15) is positioned in a suction cover (5) of the inner shell.